Another variant of the SoBig virus is likely to appear some time after 10 September, antivirus company Sophos has warned.
SoBig F, which caused chaos globally last week, is the sixth version of the worm, although only that variant and SoBig A are still infecting PCs.
While the latest SoBig worm will automatically stop infecting machines on 10 September a new variant, which may also attempt to get infected machines to download code, is probably on the way after SoBig F self-destructs, predicted a Sophos spokeswoman. Although the download windows on Friday and Sunday passed without incident, two more download windows will open this coming Friday and Sunday.